Figure 1. Frontal wall formation. A in North-east Atlantic and Mediterranean species of the genus Buffonellaria (Bryozoa, Cheilostomata): implications for biodiversity and biogeography

Figure 1. Frontal wall formation. A, note the presence of frontal-wall pores during early ontogeny in zooecia at the growth margin, and their subsequent closure in older, more proximal zooecia. Buffonellaria muriella sp. nov., NHM 2007.5.18.2, Guernsey; scale bar, 200 Mm. B, early ontogeny of the erect bilaminar Buffonellaria sp. 1, NHM 2007.5.18.12, Toulon, Mediterranean Sea; scale bar, 200 Mm.